Insulating-panel.



G. LEGNARD & E. FORMATO.

INSULATING PANEL, APPLICATION FILED DBOA, 191'1. n 1,028,575.. Patented June 4, 1912.

lNvENoRs Fue. 2

' ATTORNEYS WITNESSES 0W GILBERT B. LEGNARD AND ELMERINDO FORMATO, OF PITTSBURGH, PENNSYLVANIA.

INSULATING-PANEL.

` Specification of Letters Patent.

Application led December 4, 1911. Serial No. 663,751. v

To all' whom z'tmay concern.'

Bei it known that we, GILBERT B. LEG- Nano and ELMERINDO FORMATO, citizens of the United States of' America, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Insulating-Panels, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates. to an insulating panel especially designed for collecting acoustic disturbances, and the primary object of my invention is, to provide a panel that can be advantageously used in wall and ceiling construct-ion of' public buildings, for preventing an echo or repetition of sound that interferes with the proper transmission to an audience or others to whom it should be properly conveyed, the panel elim,- inating all undesirable reverberations, from the walls, surfaces lor angles of the compartinent or room of the building.

Another object of this invention is to provide an insulating panel that can be constructed in units -andthe' units readily assembled in the. construction of a wall orjceiling, the units being inexpensive and highly eilicient for the purposes for which it is intended. i

With the above yand other` objects in view,

' t the invention resides in the novel construction, combination and arrangement of parts to be hereinafter specifically described and then claimed.

Referencenwill now be had to the drawing, wherein :.-4

Figure l is a vertical sectional view of a,

portion of an insulating panel in accordance with this invention, and Fig. 2 is a perspective view of one of the units of an insulating panel, partly broken away and partly in section. l

A unit of lan insulating panel comprises a rectangular frame having end walls 'l and top and bottom walls 2. These walls have the rear edges thereof connected by a longitudinally corrugated plate 3, a vertically corrugated pla-te 4, and a longitudinally corrugated plate 5, the lplate 4 being ar,- ranged intermediate the plates 3 and 5,-in

Vorder to provide communicating air cells that are distributed throughout the rear side of the rectangular frame. vThe -front Yedges of the frame support a piece of cloth 6 or ay ne piece of interwoven wire. Secured to t-lie piece of cloth are pieces of paper 7, and secured to the pieces of paper 7 is a piece of cloth 8 that can be painted, covered with paper,` or otherwise finished to present a neat and attractive appearance. A unit as thus described is mounted against rateiiteaaune 4, i912. i

the outer side of a wall 9, that is provided with a funnel-shaped opening 10, having a metallic funnel ll, the large end of said funnel being in communication with the air cells formed by t-lie longitudinally corruy felt, or any pulp or composition, it being' preferable to use straw board,v whereby the plates 3, 4 and 5 can be corrugated, this character of board being ordinarily used for packing purposes.

The material 6 used in connectionwith each unit can be burlap, scrim cloth', muslin, cotton, wool, silk, cheese or other suitable material, the 4cloth being tacked, pasted or glued to the outer face of the frame. It is essential, however, that this piece of cloth .be located'some distance from the corrugated plates, in order to provide an air space that tends to interrupt and break up such sounds that pass through the outer face of the unit.

The pieces of paper 7 are preferably torn pieces that are applied with an insoluble paste made with rye flour, alum and glue,

the paper being vpasted' in various directions y tonthe seams or adjoining edges, whereby the outer piece of cloth canbe easily applied to the surfaces ofthe torn pieces of paper. The outer piece of cloth designated 8 can be painted, papered, frescoed or otherwise decorated to harmonize with the interior of the compartment in connect-ion withiwhich it is used.

From the foregoing it will be observed that each wall unit is composed of sound absorbing material, and that should a sound pass through the wall ofthe unit, it passes through the funnel 11 into the interior of t hearer couldnot understand what is being the wall in connection with which the unit is made. The wall fthat has lbeen designated 9 may represent the plaster or laths of a wall, or even brick construction, it being, essential that the openingsv 10 are 4provided in the wall in order that such soundsl that penetrate the units against said wall are carried into the wall and prevented from rebounding from saidwall.

` The sound waves encountering the wall f Aunits are absorbed, just as though the waves were permitted to continue on without any interruptions, consequently it is impossible for the sound waves to be interrupted or throw oif echoes or reverberations that would have a tendency to confuse or cause words tol inter-mingle to the extent that a unit comprising a rectangular frame provided wit-h corrugated plates at, the rear 'sides thereof, and, pieces of cloth arranged at the front side of said frame. v

2. An insulating panel comprising rectangular frame, corrugated plates carried by the rear edges thereof, pieces of cloth carried by the front edges thereof, pieces l of torn paper arranged between said pieces of cloth.

A 3. The combination with a wall provided with openings, of rectangular frames ar-v ranged against said wall and in communi- "cation with the openings of said wall, Vand sound absorbing material arranged .in each frame.

, 4. The combination with a wall having openings -formed therein, of frame units arranged against said wall and incommuni: cation with the openings thereof, 'and sound absorbing material arranged in each frame and including corrugated plates and pieces of cloth. Y

5. The combination with a wall provided with funnel-shaped openings, of 'composite board frames arranged in communication with the `openings of said wall, each frame comprising corrugated plates, pieces of cloth, and pieces of torn paper arranged between said pieces of clothkwith an air space between said corrugated plates and said pieces of cloth.

In testimony whereof we affix our signatures inthe presence of two witnesses'.

GILBERT B. LEGNARD. ELMERINDO FORMATO. 'Witnessesz MAX H. SRoLovrrz,

CHRISTINA T. Hoon. 

